Aconitum

This is a genus of over 250 species of herbaceous perennials in the buttercup family (Ranunculaceae) of which most are extremely poisonous. They are mostly found in mountainous areas of the northern hemisphere in moist but well-drained soils in forests, natural areas, moist woods and sitting along creek banks. These plants will grow better in cool summer areas.

Plant in humus-rich moist soil that drains well. In the southern portion of its range, it will need afternoon sun protection. After flowering, cut the plants back to promote re-blooming. Monkshood is poisonous, with a narcotic juice in the leaves and roots. Do not plant near the vegetable garden, where its fleshy roots could be mistaken for Jerusalem artichokes.  Wearing gloves is advisable when handling this plant.

The plants generally have lobed to deeply lobed leaves with toothed margins and clusters of flowers with the characteristic upper hood giving it the common name of Monk's Hood and Helmet Flower. The showy flowers appear in summer and range in color from blues, purples and white. 

These plants can be used in the perennial border, in a shady garden,  woodland garden and along a stream or pond. Keep in mind they are toxic to pets.

Insect, Disease and Other Plant Problems:  Crown rot, powdery mildew, and verticillium wilt can affect this plant.